Furnace or stove door



(No Model.)

P. MEYER & G. HARMS.

FURNACE 0R srrovnnocm No. 576,597.

Patented. Feb. 9, 1897.

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THE NORRIS PETERS cc. PNnTo-umm WASNINGTQN, n c.

UNITED STATES PATENT OFFICE.

FRANK MEYER AND GEORGE I-IARMS, OF PEORIA, ILLINOIS.

FURNACE OR STOVE DOOR.

SPECIFICATION forming part of Letters Patent No. 576,597, dated February 9, 1897.

Application filed February 24:, 1896. $erial No. 580,515. (No model.)

'1'0 aZZ whom it may concern.-

Be it known that we, FRANK MEYER and GEORGE HARMs,citizens of the United States, residing at Peoria, in the county of Peoria and State of Illinois, have invented certain new and useful Improvements in Furnace or Stove Doors; and we do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to certain new and useful improvements in furnace and stove doors and doorways by means of which the cylinder.

accesses to the interior parts of a furnace or stove maybe rendered practically gas and smoke tight.

Our invention relates particularly to the formation of the doorway, and it has been our practice to apply the invention to a furnace, but it may also be applied to a stove or other devices for promoting combustion.

The invention has for its object the formation of joints or the uniting of different parts in such a way as to entirely prevent the escape of gas or smoke between the parts so united.

In carrying out the invention we have used a cast-iron neck or doorway and connect therear portion of the neck with a sheet-metal interior cylinder which contains the fire-pot and rivet the flanges thereon to the sheetmetal cylinder and around the opening leading into the same. The said neck extends forward, so that the outer edge thereof is on aline with the outer surface of the furnacelVe provide an inwardly-extending flange upon the edge of the opening in the furnace-front that leads into the doorway, which said flange bounds the outer end of the neck and a sufficient distance therefrom to provide a space between the flange and the neck and entirely around the same to accommodate a filling of asbestos or other suitable material. WVe then secure the neck and flange together in such a way as to form a compact joint. We provide a rectangular frame for fitting into the opening into the forward end of the neck in such a way that when properly adjusted a space will be left between the outer face of the frame and the side of the neck, which said space is left to accommodate the placing of a filling, as asbestos or other suitable material between the parts, and the frame is provided with a wide flange extending outwardly from the outer surface thereof and from a point intermediate between the edges of the frame,but nearer to the outer edge. The said flange may extend outwardly any distance desired, but We prefer that the flange shall be made to extend outwardly far enough to overlap the joint between the outer end of the neck and the flange on the furnace-front and enough farther to provide for the placing of bolts for connecting the flange on the frame on the furnace-front at points beyond the said joint, and the frame is so disposed or placed that a space is left between the outer face of the furnace-front and the edge of the neck to accommodate the placing of a filling of asbestos or other suitable material between the parts and the furnace-front in the manner just above specified, thus providing a compact and impervious joint which will prevent gas and smoke from the furnace passing from the doorway into the hot-air chamber between the inner and outer walls or from the doorway into the furnace-room. We hinge the door to the frame or to the flange thereof when thus secured to the neck and close it over the doorway, the said door being formed of angled parts near the outer edge, which fit over or overlap the outer edge of the frame, thus making a close joint.

lVe have constructed the doorway in a somewhat different manner from that which has just been described and which we have illustrated and desire to describe as a modification of what we have described above.

The following is a short description of the same: As we have constructed it, we use a cast-iron neck or doorway and connect the rear portion of the neck with a sheet-metal interior cylinder which contains the fire-pot and rivet the flanges thereon to the sheetmetal cylinder and around the opening leading into the same, and the forward end of the neck we have provided with flanges bearing at right angles and inwardly from the walls of the neck, and we have corrugated the outer face of the flange thus provided. We have joined the furnace-front on the outside casing, which forms one of the walls, with the interior cylinder of the hot-air chamber, to the outer sides or faces of the neck and to the outer extremities thereof. \Ve have provided a rectangular frame for fitting into the opening into the forward end of the neck in such a way that when properly adjusted will leave a space between the frame and the edge of the inwardly extending flanges, which said space is left to accommodate the filling, as asbestos or other suitable material, and the furnace is provided with a wide flange extending outwardly from the outer surface of the frame. In the proper adjustment of the said frame this flange will bear over the corrugated outer face of the flange on the neck and a short distance thereform to provide for a filling of asbestos or other suitable material designed to occupy the space between the flanges, and the frame may be bolted to the neck through the flanges or in any suitable manner, so as to hold the frame-flanges and packing in firm and compact relation. lVe hinge the door to the frame or the flange thereon thus secured to the neck and close it over the doorway and the door being so constructed that a flange thereof fits over a flange on the frame, thus makinga close joint.

That our invention may be more fully understood, reference is had to the accompanying drawings, in which-- Figure 1 is a horizontal section through a furnace cylinder, the neck, and doorway. Fig. 2 is also a horizontal section through a furnace-cylinder, neck, and doorway.

In Fig. 1, Ashows a portion of the interior of a furnace and is the part which is designed to contain the fire-pot. D is the outside casing of the furnace. C is the furnace-front, which may be of the usual cast-iron construction and provided with the necessary opening therein for doorways or inlets into the furnace. O is a flange bounding the doorway-opening in the furnace-front. B is a doorway, or probably, more properly speaking, a neck, which is secured to the interior cylinder A in the manner indicated in the drawings and around the opening therein. F is a frame fitting in the opening into the neck, and F is a flange extending outwardly therefrom. E is an asbestos or other suitable filling overlapping the outer edge of the neck and interposed between the flanges of the neck and the frame. G is the door, which D is the outside casing of the furnace. U is the furnacefront, which may be of the usual cast-iron construction and provided with the necessary opening therein for doorways or inlets into the furnace. B is a doorway, or probably, more properly speaking, a neck, which is secured to the interior cylinder A in the manner indicated in the drawings and around the opening therein. 5 are flanges bearing in wardly from the outer end of the neck and at right angles therewith. b are corrugations in the outer face of the flanges. F is a frame fitting in the opening into the neck, and F is a flange extending outwardly therefrom. E is an asbestos or other suitable filling interposed between the flanges of the neck and the frame. G is the door,which is hinged to flange F, as at g.

e have used both of the forms of f urnacedoorways shown in the drawings, but We pre fer to use the form shown in Fig. 1, as we are better satisfied with the construction shown therein; but we do not desire to be limited in the claims in this application to the exact form therein shown and described, but desire that the claims shall cover other equivalent constructions that are merely colorable alterations of the same.

Having thus fully described our invention, what we claim, and desire to secure by Letters Patent, is

1. In a furnace the combination with a doorway extending outwardly from the furnace cylinder, of a flanged frame so disposed that one of the flanges will extend into the doorway and another flange extending over the outer edge thereof and a suitable filling interposed between the flanges and the doorway, all substantially as described and shown.

2. In a furnace or stove door and doorway the neck B connecting and secured to the inner and outer cylinders A, D, of the furnace,the flange O on the furnace-front bounding the outer edge of the doorway, the frame F having the door G properly hinged thereto and fitting into the doorway and provided with the flange F bearing outwardly therefrom and the gasket or filling E interposed between the parts, all substantially as described and shown.

3. In a furnace having an inner and outer shell, a doorway connecting the said inner and outer shell, a frame having flanges hearing into the doorway and in close proximity to the outside edge thereof and extending over the outside edge of v the doorway and suitable filling interposed between the flanges of the frame and the outside edge of the doorway to form an impervious joint and a door suitably secured to said frame, substantially as described and shown.

4:. In a furnace, the combination with a doorway connecting the f urnace-cylinder and the furnace-front, of a flanged frame, one of said flanges extending into the doorway the other end of the flange extending over the In testimony whereof we affix our signaouter edge of the doorwaz; and over the joint tures in presence of two witnesses.

between the doorway an the furnace-front 1 and over a portion of the said furnace-front and a filling interposed between the frame and the doorway and the furnace-front and \Vitnesses:

a door suitably secured to the said frame, CHAS. V. LA PORTE,

substantially as shown and described. W. V. TEFFT. 

